BackgroundPre-caldera eruptions formed basaltic to basaltic-andesitic volcanoes, including the extinct Talim Island and Mount Sembrano stratovolcanoes located on opposite sides of the current caldera.
The caldera has formed during at least 2 major explosive eruptions about 1 million and 27,000-29,000 years ago.
Activity after the caldera formation consisted in the formation of explosion craters on the southern end of the Talim Island at the SW rim of the caldera. Some of these maars are young, but their precise ago is unknown.
(Source: GVP volcano information)
See also: Sentinel hub | Landsat 8 | NASA FIRMS